Σ

Sigma

Unicode
U+3A3
Category
Math
HTML Entity
Σ
CSS
\3A3
The uppercase Greek letter Sigma (Σ) is most famously recognized in mathematics as the summation symbol, representing the total sum of a sequence of numbers. Beyond its quantitative roots, it frequently appears in Greek fraternity and sorority names across university campuses. In internet culture, the symbol has also been adopted in the "sigma male" meme to describe a highly independent, successful lone wolf.

How to Type

Windows
Alt+228 or Win+. then search "Sigma"
macOS
Option+W (for math summation) or Control+Command+Space then search
Linux
Ctrl+Shift+U then 03A3
HTML
Σ or Σ

In Programming

In programming and data science, the mathematical concept of Sigma is the equivalent of a `sum()` function or a `for` loop used to add together an array of numerical values.

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Tags

Greek letter sigma fraternity greek letter lone wolf mathematics series sigma formula sigma grindset sigma male sigma male meme sigma uppercase sorority sum sum notation summation summation symbol uppercase sigma ∑ vs Σ

Related Symbols

± Plus Minus Sign × Multiplication Sign ÷ Division Sign ≠ Not Equal To ≈ Approximately Equal To ∞ Infinity √ Square Root ∑ Summation ∫ Integral π Pi ≤ Less Than or Equal To ≥ Greater Than or Equal To